Truckers Report Jobs

Find Trucking Jobs

Company Driver Company Driver Dry Van Dry Van Flatbed Flatbed Refrigerated Refrigerated Specialized Specialized Owner Operator Owner Operator
More Trucking Job Searches ⌄ Fewer Trucking Job Searches
⌃

Air Leak 2016 Cascadia

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by OTR--247, Apr 7, 2025.

  1. Apr 7, 2025 #1
    OTR--247

    OTR--247 Bobtail Member

    31
    20
    Apr 27, 2010
    La Luna, Valencia
    0
    After 12h this is what gages show
    Any advise where to look, color line?, S stand for service and Secondary reservoir/system?.
    Unrelated: A one tap from a 1/2 pound hammer fix my fan clutch!!!
    Honey, Honey I fix it!!!
    What, how?
    Well Honey is complicated.
     

    Attached Files:

    OTR--247, Apr 7, 2025
    OTR--247, Apr 7, 2025
    #1
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  3. Apr 7, 2025 #2
    JB7

    JB7 Heavy Load Member

    786
    1,207
    Dec 13, 2022
    Laurel, MD
    0
    S stands for Secondary which is for the front brakes. P is for Primary which is for the rear brakes. Normally each has their own air tank and a line going from each tank to the foot/treadle valve. I would spray some soapy water on the bottom of it to see if it is leaking. Trace the lines from the front brakes back to the tank and any lines leaving the tank. There is a check valve at the entrance to both the primary and secondary tanks.
     
    JB7, Apr 7, 2025
    JB7, Apr 7, 2025
    #2
    OTR--247 Thanks this.
  4. Apr 7, 2025 #3
    OTR--247

    OTR--247 Bobtail Member

    31
    20
    Apr 27, 2010
    La Luna, Valencia
    0
    Just came back from buying a Y pushing connector that goes in the engine compartment driver side by the firewall (3/8 red lines). S pressure went down to 0, P pressure just like in pic, no movement. Got another small leak in the valve red line that connects trailer air line and another one in the supply port of the air dryer, witch i guess shouldn't be the problem cus the check valve in the tanks.
     
    OTR--247, Apr 7, 2025
    OTR--247, Apr 7, 2025
    #3
  5. Apr 7, 2025 #4
    RunRunCrew

    RunRunCrew Bobtail Member

    1
    0
    Sep 22, 2020
    0
    Dealing with this same problem right now. Lost air pressure fan clutch not cooling engine. Was told my compressor is bad
     
    RunRunCrew, Apr 7, 2025
    RunRunCrew, Apr 7, 2025
    #4
  7. May 31, 2025 #5
    OTR--247

    OTR--247 Bobtail Member

    31
    20
    Apr 27, 2010
    La Luna, Valencia
    0
    Sorry.
    Check for mayor air leak
    Check for air inlet to compressor obstruction.(hose to air filter)
    Check for air outlet obstruction.(hose to dryer)
    Check governor.
    Then go for the compressor. I can't even see mine with a flashlight parked in my backyard!.
    Fan clutch won't engage if there no air pressure.
     
    OTR--247, May 31, 2025
    OTR--247, May 31, 2025
    #5
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.